Explanation Given data: Resistance is 0.10 Ω Current is 150 mA. Length is 8 cm. Breadth is 8 cm. Formula used: Consider the expression of magnetic flux. Φ = B A cos θ (1) Here, B is the magnetic field strength, A is the area, and θ is the angle between magnetic field and area. Consider the expression of emf. ε = | Δ Φ Δ t | (2) Here, Δ Φ is the change in magnetic flux, and Δ t is the time taken. Consider the another expression of Emf. ε = I R (3) Here, I is the current, and R is the resistance. Change in magnetic flux is calculated as follows. Δ Φ = Φ f − Φ i (4) Here, Φ i is the initial magnetic flux, and Φ f is the final magnetic flux. Explanation: Substitute equation (4) in equation (2), ε = | ( Φ f − Φ i ) Δ t | (5) Consider area to be into the plane that is parallel to magnetic field. Then the angle between area and magnetic field is 0 ° . As we know that area and θ are constant, and only B is changing. Substitute equation (1) in equation (5), ε = | ( B f A cos θ − B i A cos θ ) Δ t | = | Δ B A cos 0 ° Δ t | ε = A | Δ B Δ t | (6) Substitute equation (6) in equation (3), I R = A | Δ B Δ t | | Δ B Δ t | = I R A (7) Area of the magnetic field present is, A = Length ×Breadth Substitute 8 cm for Length and 8 cm for Breadth, A = 8 cm ×8 cm = 0

College Physics: A Strategic Approach (3rd Edition)

3rd Edition

ISBN: 9780321879721

Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher: PEARSON

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Chapter 25, Problem 20P

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The rate of change of field ΔBΔt and whether the magnetic field strength increasing or decreasing.

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Chapter 25, Problem 19P

Chapter 25, Problem 21P

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Chapter 25 Solutions

College Physics: A Strategic Approach (3rd Edition)

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Ch. 25 - The conducting loop in Figure Q25.11 is moving...Ch. 25 - Figure Q25.12 shows two concentric, conducting...Ch. 25 - Figure Q25.13 shows conducting loops next to each...Ch. 25 - Two loops of wire are stacked vertically, one...Ch. 25 - Prob. 15CQ Ch. 25 - A bar magnet is pushed toward a loop of wire, as...Ch. 25 - Prob. 17CQ Ch. 25 - A metal wire is resting on a U-shaped conducting...Ch. 25 - Prob. 19CQ Ch. 25 - Old-fashioned roof-mounted television antennas...Ch. 25 - An AM radio detects the oscillating magnetic field...Ch. 25 - Prob. 22CQ Ch. 25 - Prob. 23CQ Ch. 25 - The frequency of a beam of light is increased but...Ch. 25 - Arc welding uses electric current to make an...Ch. 25 - A circular loop of wire has an area of 0.30 m2. It...Ch. 25 - In Figure Q25.27, a square loop is rotating in the...Ch. 25 - A diamond-shaped loop of wire is pulled at a...Ch. 25 - Figure Q25.29 shows a triangular loop of wire in a...Ch. 25 - A device called a flip coil can be used to measure...Ch. 25 - The electromagnetic waves that carry FM radio...Ch. 25 - The beam from a laser is focused with a lens,...Ch. 25 - A spacecraft in orbit around the moon measures its...Ch. 25 - A 6.0 mW vertically polarized laser beam passes...Ch. 25 - Communication with submerged submarines via radio...Ch. 25 - Prob. 36MCQ Ch. 25 - Prob. 1P Ch. 25 - Prob. 2P Ch. 25 - A l0-cm-long wire is pulled along a U-shaped...Ch. 25 - Figure P25.4 shows a 15-cm-long metal rod pulled...Ch. 25 - Prob. 5P Ch. 25 - In the rainy season, the Amazon flows fast and...Ch. 25 - A delivery truck with 2.8-m-high aluminum sides is...Ch. 25 - Prob. 8P Ch. 25 - Prob. 9P Ch. 25 - Prob. 10P Ch. 25 - Prob. 11P Ch. 25 - At a typical location in the United States, the...Ch. 25 - Prob. 13P Ch. 25 - A magnet and a coil are oriented as shown in...Ch. 25 - A 1000-turn coil of wire 2.0 cm in diameter is in...Ch. 25 - Figure P25.I6 shows a 100-turn coil of wire of...Ch. 25 - Figure P25.17 shows a 10-cm-diameter loop in three...Ch. 25 - The plane of a loop of wire is perpendicular to a...Ch. 25 - Prob. 19P Ch. 25 - Prob. 20P Ch. 25 - Prob. 21P Ch. 25 - A 5.0-cm-diameter loop of wire has resistance 1.2...Ch. 25 - Prob. 23P Ch. 25 - Prob. 24P Ch. 25 - Prob. 25P Ch. 25 - Prob. 26P Ch. 25 - A microwave oven operates at 2.4 GHz with an...Ch. 25 - The maximum allowed leakage of microwave radiation...Ch. 25 - Prob. 29P Ch. 25 - Prob. 30P Ch. 25 - At what distance from a 10 mW point source of...Ch. 25 - Prob. 32P Ch. 25 - A radio antenna broadcasts a 1.0 MHz radio wave...Ch. 25 - A 200 MW laser pulse is focused with a lens to a...Ch. 25 - The intensity of a polarized electromagnetic wave...Ch. 25 - Prob. 36P Ch. 25 - Prob. 37P Ch. 25 - Prob. 38P Ch. 25 - The polarization of a helium-neon laser can change...Ch. 25 - Prob. 40P Ch. 25 - Prob. 41P Ch. 25 - Prob. 42P Ch. 25 - One recent study has shown that x rays with a...Ch. 25 - Prob. 44P Ch. 25 - Prob. 45P Ch. 25 - Prob. 46P Ch. 25 - Prob. 47P Ch. 25 - Prob. 48P Ch. 25 - Prob. 49P Ch. 25 - A particular species of copepod, a small marine...Ch. 25 - Prob. 51P Ch. 25 - Prob. 52P Ch. 25 - While using a dimmer switch to investigate a new...Ch. 25 - Prob. 54P Ch. 25 - Prob. 55P Ch. 25 - A python can detect thermal radiation with...Ch. 25 - If astronomers look toward any point in outer...Ch. 25 - A 100-turn, 2.0-cm diameter coil is at rest in a...Ch. 25 - A 25-turn, 10.0-cm-diameter coil is oriented in a...Ch. 25 - People immersed in strong unchanging magnetic...Ch. 25 - Prob. 61GP Ch. 25 - Prob. 62GP Ch. 25 - A 20-cm-long, zero-resistance wire is pulled...Ch. 25 - A TMS (transeranial magnetic stimulation) device...Ch. 25 - The 10-cm-wide, zero-resistance wire shown in...Ch. 25 - Experiments to study vision often need to track...Ch. 25 - A LASIK vision correction system uses a laser that...Ch. 25 - When the Voyager 2 spacecraft passed Neptune in...Ch. 25 - A new cordless phone emits 4.0 mW at 5.8 GHz. The...Ch. 25 - In reading the instruction manual that came with...Ch. 25 - Unpolarized light passes through a vertical...Ch. 25 - Prob. 73GP Ch. 25 - Prob. 74GP Ch. 25 - What is the wavelength of 27 MHz radio waves? A....Ch. 25 - If the frequency of the radio waves is increased,...Ch. 25 - Prob. 77MSPP Ch. 25 - The metal detector will not detect insulators...Ch. 25 - A metal detector can detect the presence of metal...Ch. 25 - Which of the following changes would not produce a...

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The rate of change of field Δ B Δ t and whether the magnetic field strength increasing or decreasing.

Solution Summary: The author explains how the rate of change of field Delta B is 3.0 and the magnetic field strength increases.

The rate of change of field ΔBΔt and whether the magnetic field strength increasing or decreasing.

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Chapter 25 Solutions